Chapter 12 - States of Matter

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

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A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

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Freezing

• Solid to gas
• Liquid to solid
• Gas to solid
• Liquid to gas

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Boiling

• liquid to gas
• gas to solid
• gas to liquid
• solid to liquid

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Which state of matter has tightly packed molecules?

• solid
• liquid
• gas

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Which state of matter has a definite shape?

• solid
• liquid
• gas

What is happening when my ice cream changes from a solid to a liquid?

• freezing
• melting
• burning
• evaporation

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Define a liquid.

• Indefinite shape, indefinite volume
• Definite shape, definite volume
• Found in stars
• Definite volume, indefinite shape

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The state of matter that has no definite size or shape is

• Solid
• Liquid
• Gas

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Particles (molecules) in a ______________________ have more energy than the other states of matter.

• gas
• solid
• liquid

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